Generally speaking, you might take a look into holographic/Lippmann emulsions also. When it comes to image resolution they're certainly good enough for "micro photography"...
Originally Posted by ortholux
By the way, I've got a copy of Crawford 1960.
He gives two different recipes:
High concentration of silver, suitable for very thin coating for fine graticules:
gelatin, 4g in 80ml of water
potassium bromide, 3g in 10ml aqueous solution
chrome alum, 2ml of 1 per cent aqueous solution
pinaflavol, 6ml of 0.5 per cent alcoholic solution.
Low concentration of silver, suitable for thick coatings for Lippmann reflection filters of high resolving power:
gelatin, 12g in 80ml water
potassium bromide, 0,281g in 10ml aqueous solution
silver nitrate, 0.375g in 10ml aqueous solution
chrome alum, 3ml of 2 per cent aqueous solution
pinaflavol (or other sensitizer), 3ml of 0.1 per cent alcoholic solution."
Crawford used a kind of double-jet technique by means of two syringes.